Porous and Robust Lanthanide Metal-Organoboron Frameworks as Water Tolerant Lewis Acid Catalysts
作者:Yan Liu、Ke Mo、Yong Cui
DOI:10.1021/ic400598x
日期:2013.9.16
number of isolated Lewisacid B(III) and Ln(III) sites on the pore surfaces. The Nd-MOF assisted with sodium dodecylsulfate was found to be highly effective, recyclable, and reusable heterogeneous catalyst for the carbonyl allylation reaction, the Diels–Alder reaction, and the Strecker-type reaction in water. The transformations were cocatalyzed by Nd(III) and B(III) Lewisacids, with activities much
作者:Alexis Theodorou、Ierasia Triandafillidi、Christoforos G. Kokotos
DOI:10.1002/ejoc.201601144
日期:2017.3.17
A cheap, green and metal-free one-pot procedure for the dihydroxylation of alkenes is described. H2O2 was employed as the oxidant and 2,2,2-trifluoroacetophenone as the organocatalyst, leading to a highly sustainable protocol, where a variety of homoallylic alcohols, amino-alkenes and double bonds were converted into the corresponding polyalcohols in high to excellent yields. This manifold takes advantage
Catalytic Photoredox Allylation of Aldehydes Promoted by a Cobalt Complex
作者:Andrea Gualandi、Giacomo Rodeghiero、Rossana Perciaccante、Thomas Paul Jansen、Cristina Moreno‐Cabrerizo、Charles Foucher、Marianna Marchini、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1002/adsc.202001250
日期:2021.2.16
The preparation of homoallylic alcohols by addition of organometallic allyl compounds to carbonyls is an important strategy in organic chemistry. Allylating organometallic cobalt species can be generated employing stoichiometric quantities of Zn acting as reductant. To avoid the employment of stoichiometric amount of Zn, we have developed an allylation reaction of aromatic and aliphatic aldehydes promoted
Allylation of aldehydes by dual photoredox and nickel catalysis
作者:Andrea Gualandi、Giacomo Rodeghiero、Adriana Faraone、Filippo Patuzzo、Marianna Marchini、Francesco Calogero、Rossana Perciaccante、Thomas Paul Jansen、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1039/c9cc03344k
日期:——
Here we report the application of dualnickel/photoredox catalysis to the allylation of aliphatic, aromatic and heteroaromatic aldehydes by using commercially available reagents. The process utilizes the combination of a Ni(II) complex, [Ru(bpy)3]2+ as a photoredox catalyst, and allylacetate under blue LED irradiation, and allows the synthesis of a large variety of homoallylic alcohols.
alcohol and amine derivatives catalyzed by 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) was developed. This reaction delivered δ-fluoromethylated free alcohols and amines with in situ deprotection of benzyl protecting group under mild irradiation conditions. 4CzIPN was found to be a competent metal-free photoredox catalyst for activating several types of fluoromethylation reagents including
开发了由2,4,5,6-四(9 H-咔唑-9-基)间苯二甲腈(4CzIPN)催化的苄基保护的均丙醇和胺衍生物的加氢三氟甲基化。该反应递送δ-氟甲基化的游离醇和胺,并在温和的辐射条件下原位去保护苄基保护基。已发现4CzIPN是一种有效的无金属光氧化还原催化剂,可通过氧化猝灭活化CF 3 SO 2 Cl,Togni试剂和2-溴-2,2-二氟乙酸酯,以及通过CF 3 SO 2 Na活化几种类型的氟甲基化试剂。还原淬灭,以使简单的烯烃和迈克尔受体直接进行氢三氟甲基化。